放电等离子体转化秸秆制取单糖温度效应对产率的影响

Temperature effect of discharge plasma on yield in conversion of stalk into monosaccharide

对比秸秆的热分解和放电等离子体转化法,对其转化的温度效应及对糖产率的影响进行了分析。结果表明负载秸秆放电时接地电极和高压电极的最终温度均高于空载放电时温度;秸秆的等离子体转化在室温条件下可以进行,在低于80℃时随着反应温度的升高糖产率增加,80℃时加湿秸秆,反应90 min糖产率高达50%。单位质量秸秆在放电转化中释放的热量为5.826×103J/g,秸秆初期反应需要能量活化,加湿秸秆在放电条件下的初期活化对提高糖产率十分有利;放电产生的等离子体及活性粒子对秸秆转化制取单糖具有重要的作用。

The temperature effect and its influence on sugar yield are analyzed by antitheses of stalk heat decomposition and cornstalk conversed by discharge plasma. The results show that the final temperature of the grounding electrode and high- voltage electrode when stalk is in discharge plasma are higher than that of no stalk in discharge plasma. The stalk can be conversed into sugar by discharge plasma at room temperature. The sugar yield increases with the temperature below 80℃, and the sugar yield can be as high as 50% when the humidified stalk is conversed in discharge plasma within 90min at 80℃. The conversion reaction of stalk at the discharge plasma condition will release energy of 5. 826×10^3 J/g. The initial response needs energy, and the humidity is good for stalk conversing to sugar. The discharge plasma and activity particles are important to the conversion of stalk into sugar.